What would be the difference between to allow a group using ufw without and with sudo?
– ThomasFeb 10 at 14:40

Well it depend on what you mean. If you mean to just chmod 777, then I'd rather say no, as any user could disable the FW. I'm looking for a proper solution to add people to groups or add specific users/execs to some sudoers list.
– not2qubitFeb 10 at 14:53

Thank you! Exactly what I was looking for. This solved my problem with the small differences that: (1) su - testuser didn't work, so I needed to reboot in order for the new group and sudoers policy to take place. (2) Funny and contrary to logic, sudo ufw enable/disable and sudo ufw status verbose now also works without password.
– not2qubitFeb 10 at 21:45